Two parallel light rays, initially in phase and having a 500 nm wavelength, reach a detector after one of the rays passes through a 10 cm long block of glass with an index of refraction 1.5. (The situation is sketched at right, although not to scale.) The total number of wavelengths shifted between the two rays when they reach the detector is

a) 100,000
b) 200,000
c) 300,000
d) 500,000

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.